%0 Journal Article %T A compact metasurface-based circularly polarized antenna with high gain and high front-to-back ratio for RFID readers %A Tran-Huy, Hung %A Nguyen, Huy-Hoang %A Phuong, Thao Hoang Thi %J PLoS ONE %V 18 %N 8 %D 2023-08-22 %I Public Library of Science %~ DeepDyve